Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Volume 173, 2014
Previous Article Next Article

Oxygen reduction reaction by electrochemically reduced graphene oxide

Author affiliations

Abstract

We show that a partially reduced graphene oxide electrocatalyst, synthesized by electrochemical reduction of graphene oxide (GO), displays significantly enhanced catalytic activity towards the oxygen reduction reaction (ORR) in alkaline solutions compared to the starting GO. The electrochemical partial reduction of GO was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. Electrochemical impedance spectroscopy (EIS) verified the enhanced electron transfer ability of the electrochemically reduced graphene oxide (ErGO) compared to GO. The resultant ErGO electrode showed enhanced capacitance and an ORR onset potential of −0.11 V vs. Ag/AgCl, similar to that of a nitrogen doped reduced graphene oxide (NrGO) electrode produced by a hydrothermal process. However the ErGO exhibited considerably lower electron transfer numbers (2.0–3.3 at a potential range of −0.4 V to −1.0 V) indicating that although both catalysts operate under combined 4e and 2e ORR processes, ErGO follows a more predominant 2e pathway. The ORR process in ErGO has been linked to the presence of quinone functional groups, which favour the 2e ORR pathway.

Back to tab navigation

Associated articles

Supplementary files

Article information


Submitted
01 May 2014
Accepted
02 Jun 2014
First published
02 Jun 2014

Faraday Discuss., 2014,173, 415-428
Article type
Paper
Author version available

Oxygen reduction reaction by electrochemically reduced graphene oxide

S. K. Bikkarolla, P. Cumpson, P. Joseph and P. Papakonstantinou, Faraday Discuss., 2014, 173, 415
DOI: 10.1039/C4FD00088A

Social activity

Search articles by author

Spotlight

Advertisements